This is not an organized "ride." This is the midnight century:
It's just a group of people who are getting together for a ride on a lovely August night on open roads. There is no support, no organizer, no host, and no one is accepting any liability for any road condition or participant. If you want to come along you are welcome. But you are on your own and you should understand that there are risks with riding alone at night on dirt country roads far away from urban areas.
Do not attempt this ride if you are not sure of your ability to ride the course, and be sure to have a bail out plan in place in case things don't work out.